30ARENAL VOLCANO, COSTA RICA
There are several trails leading to the closest safe observatory point which is actually the perimeter of the volcanic caldera. The trails include the El Silencio trail, Los Tucanes, and Arenal volcano national park, which is the observatory at Los Lagos.
The hot springs at Tabacon are at high risk of
being in the danger zone. If you prefer seeing the volcanic crater, you are suggested to go to Paos Volcano. All hotels situated in this place have plans in case a major eruption occurs. The crater of the volcano from the observation point is worth seeing. (Source: Entercostarica.com)